Firefox: Firefox extension HTTPS everywhere, which switches your browser to SSL automatically for any web sites where a secure connection is available, just hit version 1.0 and now supports well over 1000 sites, including Facebook, Google, Twitter, Tor, and others.

HTTPS Everywhere is a product by the Electronic Frontier Foundation (EFF) and is currently only available for Firefox. The EFF notes that they want to build Chrome version, but unfortunately the extension wouldn't work in Chrome without changes to the browser's source. The last time we looked at HTTPS everywhere, it only supported a handful of sites. Now, the extension boasts hundreds of new ones, including file transfer and upload services, social networks, and more. The new version also addresses some of the performance issues in the beta version.